Answer:
The answer is demography.
Explanation:
Demogrpahers study places and regional and spatial concepts of how the world interacts with people.This essentially is a very important part of geography.
Adjectives. <span>When a prepositional phrase modifies a noun, pronoun it is considered to function as an adjective within the sentence.</span>
It occurs when and where there is not enough water to meet both demands and those of ecosystems to function effectively.
Over 68 percent of the fresh water on Earth is found in icecaps and glaciers.
So the answer probably is c. icecaps and rivers